Master-key lock.



No. 652,337. v Patantbd June 26, I900. w. H. TAYLOR.

MASTER KEY LUCK.

(Application filed. Apr. 6, 1900.)

(No llodel.)

INVENTOR Allarney WITNESSES NITED STATES,

WARREN H. TAYLOR, OF STAMFORD, CONNECTICUT, ASSIGNOR TO THE YALE &TOWVNE MANUFACTURING COMPANY, OF SAME PLACE.

SPECIFICATION forming part of Letters Patent N 0. 652,337, dated June26, 190i).

Application filed April 6, 1900.

To all whom it may concern:

Be it known that I, WARREN I-I. TAYLOR, of Stamford, in the county ofFairfield and State of Connecticut, have invented certain new and usefulImprovements in Master-Key Locking Mechanism; and I do hereby declarethe following to be a full, clear, and exact description of theinvention, such as will enable others skilled in the art to which itappertains to make and use the same.

My invention relates to an improvement in master-key locking mechanism;and it consists in certain novel parts and combinations of parts ofpin-tumbler mechanism whereby the lock may be opened by the master-keyand by the key constructed for the special lock.

In the accompanying drawings, Figure 1 is aview, partlyin section, of apadlock embodying my invention, showing a master-key therein. Fig. 2 isa similar View of a portion of the lock, showinga change-key therein.Fig. 3 is a plan view of the bolt mechanism of the lock. Fig. 4. is aviewin section of the tum bler-chamber and sliding blocks. Fig. 5 is anouter end View, and Fig. 6 an inner end view, of same; and Fig. 7 is aside view, and Fig. 8 an end view, of the block-guide or casmg.

WVhile I have shown and shall describe my improvements in connectionwith a padlock, the invention resides in the adaptation of the pintumbler mechanism to sliding blocks. Hence the particular lockingmechanism is not material.

A represents the lock-casing, preferably made of two struck-up pieces ofsheet metal, and 13 represents the tumbler-case, having a series ofpockets at therein for the reception of the pin-tumblers b. Thistumbler-casing is provided with straight parallel sides and ends and acurved edge, the latter being semicylindrical in shape and provided withshoulders c, which latter rest upon the outer edge of the inner casingor block-guide C. The case B is riveted to the casing or guide C, andthe latter in turn is provided at its outer end with ears d, which passthrough holes in the outside sheet-metal casing A and when riveted orupset hold the parts together. The. pin-tumbler case B is provided witha l0ngi- Serial No. 11,838. (No model.)

tudinal groove in which is seated a guide-rib formed on the adjacentface of the masterblock E. This sliding master-block E has holestherethrough corresponding in number, position, and diameter to thechambers in the case B and is provided with a groove to receive the ribformed on the adjacent face of the key-block F. The blocks E and F restWithin the guide or casing C, with their pinslots in line with therecesses in the tumblercase B, and the block is provided with arectangular face or portion 6, which latter projects through thelook-casing A and carries the keyway. The block F is also provided witha seriesof pin-slots corresponding-to the slots in the case B andmaster-block E and is provided on its inner end with the projection F,which when moved engages with the sliding bolts G and G, which in thepresent instance lock the shackle in place. H is carried by the casing Aand is encircled by a spring I, which when the shackle is re- Theshackle leased by the bolts throws out the shackle in the usual manner.The bolts G and G are mounted in the casingA between and in a positionto enter recesses in the legs of the shackle, and each is provided onits inner end with an inwardly-projecting overlapping lip which latterare beveled on their inner or adjacent faces and which rest in a linewith the projection F on the sliding key-block F, so that when thelatter is slid longitudinally the projection F enters between the lips fand withdraws both bolts, springs f being interposed between the twobolts, as shown, for the purpose of normally holding them in theirlocked or expanded positions.

The pins or tumblers b are each divided at two points, or some of theseries may be divided at two points and some at one point, and whenthese points of division coincide either with the line between thekey-block F and master-block E or with line between master-block E andtumbler-case B a continued longitudinal pressure on the key will causethe key-block F to slide longitudinally and the projection F thereon toenter between the overlapping lips f of the bolts G and G, and thusdisengage the bolts from the hasp.

For preventing accidental longitudinal movement of the key-block andalso for hold ing the block F while the key is being inserted, so as toprevent any binding of the tumblers and consequent hard or stiff Workingof the key and the look, I have provided the spring J, which latter iswound on a pivot,

with one end bearing against the 'tumbler- 1 case and'the other againstthe key-block F. i This spring is sufficiently stiff to prevent any iblock F and master-block E,Whi le the chan gekey is constructed toseparate the sections on the line of juncture vof the tumbler-case B andthe master-block E.

As before stated, my improvement relates i more particularly topin-tumbler mechanism combined with a sliding key-block for actuatingany style of locking mechanism. Hence I would have it understood that Ido not limit myself to any particular style of look, but

consider myself at liberty to employ my im- I provements on any form oflock.

Having fully described my invention, what I claim as new, and desire tosecure by Letters Patent, is

1. The combination with a tumbler-case, a 1

sliding master-block and a sliding key-block, the case and blocks havingrecesses for the tumblers, of the sectional pin-tumblers adapted to lockboth blocks to the case,or be moved so as to release the key-block, orrelease the master-block from the case and lock it to the key-block.

2. The combination with an outer casing, i an inner case or guide, atumbler-case, and v a sliding master-block and sliding key-block carriedby said inner case or guide, of sectional pin-tumblers located withinrecesses in I said blocks and tumbler-case, substantially as and for thepurpose set forth.

3. In a lock the combination with a longitudinally-sliding key-block,and a sliding bolt actuated by direct contact with said slidingkey-block of tumblers for locking the block against movement.

4. In a lock the combination with a sliding .keyblock, a sliding boltactuated by direct contact with said key-block and a spring for holdingsaid key-block in its normal position, of tumblers for locking the blockagainst movement.

5. In a lock the combination with a sliding key-block having a pointedprojection on its inner end and spring-actuated bolts having overhanginglips the inner faces of which are adapted to be engaged by saidprojection on the key-block, of tumblers for locking the block againstmovement.

6. In a lock, the combination with a sliding key-block having a pointedprojection on its inner end, and a spring-actuated bolt having a lipadapted to be engaged by the projection on the key-block and movedthereby against the pressure of the spring, of tumblers for locking theblock against movement.

7. In a lock the combination with a longitudinally-sliding key-block, asliding master block adjacent to said key-block and sectionalpin-tumblers in said blocks, of a bolt actu- .ated by the slidingmovement of the keyblock.

8. In a lock the combination'with a sliding key-block, a slidingmaster-block, sectional pin -tumblers in said blocks, and a springtending to hold said key-block in its normal position, of a boltactuated by the sliding movement of the key-block.

9. In alock the combination with an outer case, an inner case, alongitudinally-sliding key-block and a sliding master-block within saidinner case, and tumblers for locking said block against movement, of abolt actuated by said key-block.

In testimony whereof I have signed this specification in the presence oftwo subscribing witnesses.

WARREN I-I. TAYLOR.

\Vitnesses:

SCHUYLER MERRIIT, W. S. ABEL.

